Drilling-machine.



L. J. BLACK.

DRILLING MACHINE.

APPLICATION FILED 00120, 1910.

' Patented Aug. 6, 1912.

2 SHEETSSHEET l.

a L 1 m:

ag f mun L. J. BLACK.

DRILLING MACHINE.

APPLICATION FILED 00120, 1910.

1,034,573. Patented g- 6. 1912.

2 SHEETS-SHEET 2.

LEE J. BLACK, 01? BEAUMONT, TEXAS.

DRILLING-MACfiINE.

Specification of Letters Patent.

Patented Aug. 6, 1912.

Application filed October 20, 1910. Serial No. 588,175.

To all whom it may concern:

Be it known that 1, LEE J'. BLACK, a citizen of the United States, residing at Beaumont, in the county of Jefferson and State of Texas, have. invented certain new and useful Improvements in Drilling-Machines, of which the following is a specification.

This invention relates to rotary drilling machines employed for boring oil and other wells, and characterized by a rotary turntable having gripping jaws which are engageable with the tube or other part to be driven. The turn-table has a circular rack in mesh with which is a pinion carried by a drive-shaft connectedto a suitable source of power.

It is the object of the present invention to provide in a machine of this kind improved jaws or gripping devices characterized by great strength, simplicity of construction, and ease of access.

The invention also has for its object to provide a bed frame which is so constructed that the pinion shaft is kept in proper alinement, and the pinion is kept properly in mesh with the circular rack on the turntable, thus preventing wear of the teeth of both gears.

A further object of the invention is to provide improved means for securing the bearing box of the pinion shaft to the bed frame, a fastening being provided which permits the removal of the pinion and its shaft without disturbing the turn-table and the parts carried thereby.-

With the herein stated objects in view, the invention consists in a novel construction and arrangement of parts to be hereinafter described and claimed, reference being had to the accompanying drawings, forming a part of this specification, in which draw- 1ngs- Figure 1 is a plan View of the machine. Figs. 2 and 3 are sections on the lines 2-2 and 33, respectively, of Fig. 1. Fig. 4 is an elevation of the machine. Fig. 5 is a cross-section on the line 55 of Fig. 1. Fig. 6 is a plan view of a fragment of the bed frame of the machine, with one of the bearing boxes of the pinion shaft removed. Fig. 7 is a perspective view of one of the washers to be hereinafter described.

Referring specifically to the drawings, the bed frame of the machine is cast in two separable sections, indicated at 10 and 11, respectively. At the meeting edges ofthe sections, are upstanding flanges 12 through which pass bolts 18 for securing the sections together. The bed frame may be supported on sills 14.

The bed-frame section 10 supports the turn-table 15, the latter being mounted for rotary movement in any suitable manner. Anti-friction rollers 16 are provided.

At the center of the turn-table is an opening 17 through which the tube or other part to be rotated extends, and on opposite sides of this opening are gripping jaws for holding said tube or other part. These gripping jaws are rollers 18 mounted on shafts 19 mounted in supports 20 carried by slide blocks 21 which are adjustable across the turntable toward and from each other to bring the rollers 18 into gripping and release positions. The oppositely disposed adjustable blocks 21 are castings, and as clearly shown in Fig. 2, have formed in their ends rectangular shaped housings or pockets which snugly receive the correspondingly shaped nuts 24, and have end openings through which the nuts may be removed. On the top of the turn-table, on opposite sides of the opening 17, are integral raised portions 22 forming slide-ways on which the blocks are mounted, the latter having depending portions located between the slide-ways and fitting the inner vertical edges thereof which are plane, as clearly shown in Fig. 2, whereby the blocks are guided in their movement across the turntable and are also removable without first sliding them to the ends of the ways.

The means for adjusting the blocks 21 comprise screw stems 23 passing loosely through holes in the ends of the blocks and threaded through nuts 24 seating in recesses in said ends. The screw stems are oppositely threaded at their ends so that when they are turned in one direction they draw the blocks together, whereas a turn of the stems in the opposite direction causes the blocks to move apart. Midway between the ends of each screw stem is an enlarged angular portion 25 which affords a hold for a wrench or other suitable device for turning the screw stem. The screw stems are held against travel-in the direction of their length by means of forks 26 straddling the parts 25, the fork branches having openings through which the stems loosely pass The forks have shanks 27 which seat in recesses in the top-of the raised parts 22 of the turn-table,

and in which they are held by set screws 28 threaded through the outer edges thereof.

The gripping means herein described are simple in construction, readily acccessible, and easily operated. The parts are rigid, and can be easily assembled and taken apart for repairs.

On the bottom of the turn-table is a circular rack 29, and by means of a drive pinion 30 in mesh therewith, the turn-table is rotated. The pinion is fast on a shaft31 having a sprocket-wheel 32 through which motion is imparted to the shaft from any suitable source of power. A clutch 33 is provided for connecting and disconnecting the sprocket-wheel.

The shaft 31 is supported at its end adjacent to the sprocket-wheel 32 in a bearing box 34 mounted on the bed-frame section 11. That end of the shaft which is adjacent to the pinion 30 is supported in a bearing box 35 mounted on the bed-frame section 10. These two bearing boxes are removably mounted on the bed frame, so that the pinion may be disengaged from the rack without disturbing the turn-table or the parts carried thereby. A special fastening is provided for the bearing box 35, which will now be described.

The bed-frame section 10 has a cross-bar 36 which is formed intermediate its ends with a recess 37 forming a seat for the box 35. The side walls of this recess are stepped as shown and the recess is also tapered in the direction of one of its ends as clearly shown in Fig. 6. The bottom of the box is shaped to fit snugly in the recess in which it will be securely held by reason of the taper and the fastening means to be presently described. At the ends of the cross bar are raised portions 38 which are tapered to conform to the taper of the recess 37. The ends of the box have outwardly extending flanges 39 which fit on top of the raised portions 38, and at the outer ends of the latter are upstanding spaced lugs 40 engaging the outer ends of the flanges 39.

In the top of the cross bar, at each end thereof, is a groove 41 coinciding with the space between the lugs and extending in the direction of the length of the cross bar. The grooves extend a suflicientdistance through the parts 38 so as to come beneath the flanges 39. The portions of the grooves which extend through the parts 38 are undercut, as'indicated at 42 in Figs. 5 and 6, the undercut portions including the spaces between the lugs 39. The outer, ends of the grooves are enlarged as indicated at 43 to the'extentof the undercut. The purpose of these grooves is to receive the bolts 44 which fasten the box 35 down in place on the cross bar 36, the heads of. said bolts seating in Copies of this patent may be obtained for the undercut portions of the grooves. In the ends of the flanges 39 are vertical recesses 45 which are located a slight distance off the center thereof, and are deflected laterally at their inner ends as indicated at 46.

This is clearly illustrated in Fig. l, in which the nut 47 and washer 48 of one of the bolts 44 are shown removed.

To fasten the box 35 in place it is inserted into the recess 37 and moved in the direction of its narrow end until the outer ends of the recesses 45 are in alinement with the grooves 41. The bolts 44 are then inserted into the grooves from the enlarged I outer ends thereof, and slid inwardly until they enter the recesses 45, thebolt heads being located in the undercut portions of the grooves. The bolts are now moved inwardly until they reach the inner ends of the recesses 45. The box can now be moved to its final position within the recess 37, the bolts, during this movement, passing along the lateral portions 46 of the recesses. The fastening is completed by applying the washers 48 and the nuts 47, the former en gaging the top of the flanges 39. The washers are locked agalnst turning movement by means of lugs 49 formed on the bottom.

thereof, said lugs seating in the recesses 36.

By the structure herein described the box 7 35cis securely fastened in place, and can also be quickly and easily removed for the pur-' pose of replacingbroken or defective bearings, pinions, clutches and sprockets, or repairing the same without disturbing the in said housings and removable through said end openings, gripping elements carried by said frames, screw threaded stems passing loosely through the alined side openings of said housings and engaged with said nuts, supports for said stems mounted on said table, and means for turning said stems to move said gripping frames toward or from each other. r 1

In testimony whereof I affix my signature in presence of two witnesses.

LEE J. BLACK. 1

Witnesses:

M. J. Bliss, C. T. WILL.

five cents each, by addressing'the Commissioner of Eatents,

Washington, D. C. 

